in training in norway. it's been described as the world's toughest sport. cross—country skiing is, at times, the ultimate uphill struggle. but andrew musgrave has the summit in his sights. commentator: and look at this from andrew musgrave. .. - the scot finished seventh at the last games, britain's best—ever result, and he's been a contender ever since. in the summer, training out on the roads, on roller skis as he chases what once seemed an impossible dream. i remember when i was 14, 15 back in scotland talking about what we were going to do in cross—country skiing. a medal at the olympics was the sort of unachievable goal up there, where it's now definitely achievable. it would be something extraordinary, wouldn't it? yeah, definitely. definitely. like, a british person getting a medal in cross—country skiing, like, shouldn't happen, but i reckon we'll make it happen. how? well, the entire british team have moved here — to norway, the home of cross—country, where they've